JP5011231B2 - refrigerator - Google Patents

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Publication number
JP5011231B2
JP5011231B2 JP2008204976A JP2008204976A JP5011231B2 JP 5011231 B2 JP5011231 B2 JP 5011231B2 JP 2008204976 A JP2008204976 A JP 2008204976A JP 2008204976 A JP2008204976 A JP 2008204976A JP 5011231 B2 JP5011231 B2 JP 5011231B2
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antioxidant
resin container
refrigerator
storage chamber
paper
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JP2010038494A (en
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敦子 船山
寿江 高崎
祐子 赤木
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Hitachi Appliances Inc
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Hitachi Appliances Inc
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Priority to JP2008204976A priority Critical patent/JP5011231B2/en
Priority to KR1020090012667A priority patent/KR101050329B1/en
Priority to CN2009100049515A priority patent/CN101644522B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
    • A23L3/3409—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23L3/3418—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • A23L3/3427—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O in which an absorbent is placed or used
    • A23L3/3436—Oxygen absorbent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/043—Treating air flowing to refrigeration compartments by creating a vacuum in a storage compartment

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Description

本発明は、冷蔵庫に関する。   The present invention relates to a refrigerator.

この種の従来の冷蔵庫として、特開２００７−６４６２０号公報（特許文献１）に記載されたものがある。この冷蔵庫は、冷蔵庫内の冷気が循環される空間に開放された貯蔵室に大気圧状態の基で揮発する抗酸化剤を内部に備えた抗酸化放出ユニットを配置し、この抗酸化剤の抗酸化成分を貯蔵室に放出して貯蔵室内の野菜などの食品を覆うことにより、食品中の栄養成分が空気中の酸素と結びついて酸化されて分解し減少することを防止しようとするものである。   As this type of conventional refrigerator, there is one described in Japanese Patent Application Laid-Open No. 2007-64620 (Patent Document 1). In this refrigerator, an antioxidant release unit having an antioxidant that volatilizes under an atmospheric pressure group is disposed in a storage chamber that is open to a space where cold air in the refrigerator is circulated. By releasing oxidized components into the storage room and covering foods such as vegetables in the storage room, it is intended to prevent the nutritional components in the food from being oxidized and decomposed and reduced in combination with oxygen in the air. .

また、別の従来の冷蔵庫として、特許第４０１５６８７号公報（特許文献２）に記載されたものがある。この冷蔵庫は、食品の収納時に密閉されて０.７気圧の低圧にされる低圧室を備えたものである。このように低圧室の圧力を０.７気圧まで低下させることにより、低圧室内の酸素濃度を低くすることができ、これによって低圧室に収納した食品中の栄養成分が空気中の酸素と結びつくことを抑制して栄養成分の酸化劣化の防止を図ろうとするものである。   Another conventional refrigerator is described in Japanese Patent No. 4015687 (Patent Document 2). This refrigerator is equipped with a low-pressure chamber that is hermetically sealed when food is stored and has a low pressure of 0.7 atm. By reducing the pressure in the low-pressure chamber to 0.7 atm in this way, the oxygen concentration in the low-pressure chamber can be lowered, and thereby the nutritional components in the food stored in the low-pressure chamber are combined with oxygen in the air. It is intended to prevent oxidative deterioration of nutritional components by suppressing the above.

特開２００７−６４６２０号公報JP 2007-64620 A 特許第４０１５６８７号公報Japanese Patent No. 4015687

しかし、上述した特許文献１の冷蔵庫では、貯蔵室に収納される食品は大気圧状態の基にあって酸素濃度の高い状態で保存されるので、食品中の栄養成分の酸化劣化を有効に防止するためには抗酸化剤から多量の抗酸化成分を放出させる必要があった。また、この冷蔵庫では、冷蔵庫内の冷気が循環される空間に開放された貯蔵室に抗酸化放出ユニットを設置しているので、循環される冷気全体の酸素が食品中の栄養成分と結びつくことを防止しなければならず、この点からも抗酸化剤から多量の抗酸化成分を放出させる必要があった。これによって、抗酸化放出ユニットの大型化が必要となり、食品収納スペースの減少及びコストアップを招くこととなっていた。   However, in the refrigerator of Patent Document 1 described above, the food stored in the storage room is stored in a state of high atmospheric pressure and based on atmospheric pressure, so that the oxidative deterioration of nutritional components in the food is effectively prevented. In order to do so, it was necessary to release a large amount of antioxidant components from the antioxidant. Also, in this refrigerator, the antioxidant release unit is installed in a storage room that is open to the space where the cold air in the refrigerator is circulated, so that the oxygen in the entire circulated cold air is linked to the nutritional components in the food. In this respect, it was necessary to release a large amount of antioxidant components from the antioxidant. This necessitates an increase in the size of the antioxidant release unit, leading to a reduction in food storage space and an increase in cost.

また、上述した特許文献２の冷蔵庫では、低圧室の圧力を下げることによってのみ栄養成分の酸化劣化を防止しているため、栄養成分の酸化劣化の有効な防止を図るには低圧室の圧力を極めて低い圧力まで低下させる必要があった。そのために減圧装置の大型化及び低圧室を構成する筐体の耐圧強度の増大が必要となり、食品収納スペースの減少及びコストアップを招くこととなっていた。   Further, in the refrigerator of Patent Document 2 described above, the oxidative degradation of the nutrient component is prevented only by lowering the pressure in the low pressure chamber. Therefore, in order to effectively prevent the oxidative degradation of the nutrient component, the pressure in the low pressure chamber is set. It was necessary to reduce the pressure to a very low pressure. Therefore, it is necessary to increase the size of the decompression device and increase the pressure resistance of the casing constituting the low pressure chamber, leading to a decrease in food storage space and an increase in cost.

本発明の目的は、食品収納スペースの増大及びコスト低減を図りつつ、減圧貯蔵室に収納した食品中の栄養成分の酸化劣化を長期間にわたって防止できる冷蔵庫を得ることにある。   The objective of this invention is obtaining the refrigerator which can prevent the oxidative degradation of the nutrient in the foodstuff accommodated in the pressure-reduction storage chamber for a long period, aiming at the increase in food storage space and cost reduction.

前述の目的を達成するために、本発明の冷蔵庫は、冷蔵庫内に形成され大気圧より低い圧力状態に減圧される貯蔵室内に抗酸化剤を有する抗酸化成分放出手段が設けられ、前記抗酸化剤はパルプとバインダーに混合されて粒状であって、前記抗酸化成分放出手段は、前記抗酸化剤を収納した樹脂容器本体と樹脂容器蓋とを有する樹脂容器と、を備え、前記樹脂容器蓋は前記樹脂容器本体側の面に全長にわたって凹部を形成し、前記樹脂容器内部の抗酸化成分を外部に導いて放出する部分として紙を備え、該紙は、前記凹部内に全長にわたって配置され、前記樹脂容器本体の周縁部及び前記樹脂容器蓋の周縁部は、その一部に前記紙を介在して接合して、前記紙の両端部が当該樹脂容器の外部に臨んでおり、前記抗酸化剤は大気圧状態よりも低い圧力状態の下で抗酸化成分が前記紙を通して多く放出されることを特徴とする。 To achieve the foregoing objects, the refrigerator of the present invention, antioxidants emission means having an antioxidant is provided in the storage chamber is formed in the refrigerator is reduced to a lower pressure condition than the atmospheric pressure, the antioxidant The agent is mixed with pulp and a binder, and the antioxidant component release means includes a resin container having a resin container main body containing the antioxidant and a resin container lid, and the resin container lid Forms a recess over the entire length of the surface of the resin container main body, and includes paper as a part that guides and releases the antioxidant component inside the resin container, and the paper is disposed over the entire length in the recess, The peripheral part of the resin container body and the peripheral part of the resin container lid are joined to a part of the resin container with the paper interposed therebetween, and both ends of the paper face the outside of the resin container, and the antioxidant Agent is lower than atmospheric pressure Wherein the antioxidant component under pressure conditions are often discharged through the paper.

また、前記抗酸化剤としてアスコルビン酸またはトコフェノールを用いたことを特徴とする。   In addition, ascorbic acid or tocophenol is used as the antioxidant.

また、前記パルプは前記抗酸化剤に対して５０％以上１００％以下の割合で配合されることを特徴とする。   The pulp is blended in a proportion of 50% to 100% with respect to the antioxidant.

また、前記バインダーはウレタンまたはメチルセルロースであることを特徴とする。   The binder may be urethane or methylcellulose.

また、前記バインダーは抗酸化剤に対して５％以上５０％以下の割合で配合されることを特徴とする。   The binder is blended in a proportion of 5% to 50% with respect to the antioxidant.

また、前記貯蔵室の減圧時の圧力を０.８０〜０.９５気圧に設定したことを特徴とする冷蔵庫。   The refrigerator is characterized in that the pressure during decompression of the storage chamber is set to 0.80 to 0.95 atm.

係る本発明の冷蔵庫によれば、食品収納スペースの増大及びコスト低減を図りつつ、減圧貯蔵室に収納した食品中の栄養成分の酸化劣化を長期間にわたって防止できる冷蔵庫を得ることができる。   According to the refrigerator of this invention which concerns, the refrigerator which can prevent the oxidative degradation of the nutrient component in the foodstuff accommodated in the decompression storage chamber over a long period can be obtained, aiming at the increase in food storage space and cost reduction.

以下、本発明の一実施形態の冷蔵庫について図を用いて説明する。まず、図１及び図２を参照しながら冷蔵庫の構成に関して説明する。図１は本実施形態の冷蔵庫の中央縦断面図、図２は図１の冷蔵室の最下段空間部分の断面斜視図である。   Hereinafter, the refrigerator of one Embodiment of this invention is demonstrated using figures. First, the configuration of the refrigerator will be described with reference to FIGS. 1 and 2. FIG. 1 is a central longitudinal cross-sectional view of the refrigerator of the present embodiment, and FIG. 2 is a cross-sectional perspective view of the lowermost space portion of the refrigerator compartment of FIG.

冷蔵庫は、冷蔵庫本体１及び扉６〜１０を備えて構成されている。冷蔵庫本体１は、鋼板製の外箱１１と樹脂製の内箱１２との間にウレタン発泡断熱材１３及び真空断熱材（図示せず）を有して構成され、上から冷蔵室２，冷凍室３，４，野菜室５の順に複数の貯蔵室を有している。換言すれば、最上段に冷蔵室２が、最下段に野菜室５が、それぞれ区画して配置されており、冷蔵室２と野菜室５との間には、これらの両室と断熱的に仕切られた冷凍室３，４が配設されている。冷蔵室２及び野菜室５は冷蔵温度帯の貯蔵室であり、冷凍室３，４は、０℃以下の冷凍温度帯（例えば、約−２０℃〜−１８℃の温度帯）の貯蔵室である。これらの貯蔵室２〜５は仕切り壁３３，３４，３５により区画されている。   The refrigerator includes a refrigerator body 1 and doors 6 to 10. The refrigerator body 1 includes a urethane foam heat insulating material 13 and a vacuum heat insulating material (not shown) between a steel plate outer box 11 and a resin inner box 12. A plurality of storage rooms are provided in the order of the rooms 3 and 4 and the vegetable room 5. In other words, the refrigerator compartment 2 is arranged at the uppermost stage, and the vegetable compartment 5 is arranged at the lowermost stage, and between the refrigerator compartment 2 and the vegetable compartment 5, the two rooms are insulated from each other. Partitioned freezer compartments 3 and 4 are provided. The refrigerator compartment 2 and the vegetable compartment 5 are storage compartments in a refrigeration temperature zone, and the freezer compartments 3 and 4 are storage compartments in a freezing temperature zone of 0 ° C. or less (for example, a temperature zone of about −20 ° C. to −18 ° C.). is there. These storage chambers 2 to 5 are partitioned by partition walls 33, 34, and 35.

冷蔵庫本体１の前面には、貯蔵室２〜５の前面開口部を閉塞する扉６〜１０が設けられている。冷蔵室扉６は冷蔵室２の前面開口部を閉塞する扉、冷凍室扉８は冷凍室３の前面開口部を閉塞する扉、冷凍室扉９は冷凍室４の前面開口部を閉塞する扉、野菜室扉１０は野菜室５の前面開口部を閉塞する扉である。冷蔵室扉６は観音開き式の両開きの扉で構成され、冷凍室扉８，冷凍室扉９，野菜室扉１０は、引き出し式の扉によって構成され、引き出し扉とともに貯蔵室内の容器が引き出される。   On the front surface of the refrigerator main body 1, doors 6 to 10 that close the front opening portions of the storage chambers 2 to 5 are provided. The refrigerator compartment door 6 closes the front opening of the refrigerator compartment 2, the freezer compartment door 8 closes the front opening of the freezer compartment 3, and the freezer compartment door 9 closes the front opening of the freezer compartment 4. The vegetable compartment door 10 is a door that closes the front opening of the vegetable compartment 5. The refrigerator compartment door 6 is constituted by a double door with double doors, and the freezer compartment door 8, the freezer compartment door 9, and the vegetable compartment door 10 are constituted by drawer type doors, and the container in the storage compartment is pulled out together with the drawer door.

冷蔵庫本体１には、冷凍サイクルが設置されている。この冷凍サイクルは、圧縮機１４，凝縮器（図示せず），キャピラリチューブ（図示せず）及び蒸発器１５、そして再び圧縮機１４の順に接続して構成されている。圧縮機１４及び凝縮器は冷蔵庫本体１の背面下部に設けられた機械室に設置されている。蒸発器１５は冷凍室３，４の後方に設けられた冷却器室に設置され、この冷却器室における蒸発器１５の上方に送風ファン１６が設置されている。   The refrigerator body 1 is provided with a refrigeration cycle. This refrigeration cycle is configured by connecting a compressor 14, a condenser (not shown), a capillary tube (not shown) and an evaporator 15, and then the compressor 14 again. The compressor 14 and the condenser are installed in a machine room provided at the lower back of the refrigerator body 1. The evaporator 15 is installed in a cooler room provided behind the freezing rooms 3 and 4, and a blower fan 16 is installed above the evaporator 15 in the cooler room.

蒸発器１５によって冷却された冷気は、送風ファン１６によって冷蔵室２，冷凍室３，４及び野菜室５の各貯蔵室へと送られる。具体的には、送風ファン１６によって送られる冷気は、開閉可能なダンパー装置を介して、その一部が冷蔵室２及び野菜室５の冷蔵温度帯の貯蔵室へと送られ、他の一部が冷凍室３，４の冷凍温度帯の貯蔵室へと送られる。   The cold air cooled by the evaporator 15 is sent to the storage rooms of the refrigerator compartment 2, the freezer compartments 3, 4 and the vegetable compartment 5 by the blower fan 16. Specifically, a part of the cool air sent by the blower fan 16 is sent to a storage room in the refrigerator temperature zone of the refrigerator room 2 and the vegetable room 5 through a damper device that can be opened and closed, and the other part. Is sent to the storage room of the freezing temperature zone of the freezing rooms 3 and 4.

送風ファン１６によって冷蔵室２，冷凍室３，４及び野菜室５の各貯蔵室へと送られる冷気は、各貯蔵室を冷却した後、冷気戻り通路を通って冷却器室へと戻される。このように、本実施形態の冷蔵庫は冷気の循環構造を有しており、各貯蔵室２〜５を適切な温度に維持する。   The cool air sent to the storage rooms of the refrigerator compartment 2, the freezer compartments 3 and 4 and the vegetable compartment 5 by the blower fan 16 is returned to the cooler compartment through the cool air return passage after cooling each storage compartment. Thus, the refrigerator of this embodiment has a cold air circulation structure, and maintains each of the storage chambers 2 to 5 at an appropriate temperature.

冷蔵室２内には、透明な樹脂板で構成される複数段の棚１７〜２０が取り外し可能に設置されている。最下段の棚２０は、内箱１２の背面及び両側面に接するように設置され、その下方空間である最下段空間２１を上方空間と区画している。また、各冷蔵室扉６の内側には複数段の扉ポケット２５〜２７が設置され、これらの扉ポケット２５〜２７は冷蔵室扉６が閉じられた状態で冷蔵室２内に突出するように設けられている。冷蔵室２の背面には、送風ファン１６から供給された冷気を通す通路を形成する背面パネル３０が設けられている。   A plurality of shelves 17 to 20 made of a transparent resin plate are detachably installed in the refrigerator compartment 2. The lowermost shelf 20 is installed in contact with the back surface and both side surfaces of the inner box 12, and divides the lowermost space 21, which is the lower space, from the upper space. Further, a plurality of door pockets 25 to 27 are installed inside each refrigerator compartment door 6, and these door pockets 25 to 27 protrude into the refrigerator compartment 2 with the refrigerator compartment door 6 closed. Is provided. A back panel 30 that forms a passage through which the cool air supplied from the blower fan 16 passes is provided on the back of the refrigerator compartment 2.

最下段空間２１には、左から順に、冷凍室３の製氷皿に製氷水を供給するための製氷水タンク２２，デザートなどの食品を収納するための収納ケース２３，室内を減圧して食品の鮮度保持及び長期保存するための減圧貯蔵室２４が設置されている。減圧貯蔵室２４は、冷蔵室２の横幅より狭い横幅を有し、冷蔵室２の側面に隣接して配置されている。   In the lowermost space 21, in order from the left, an ice making water tank 22 for supplying ice making water to an ice tray in the freezing room 3, a storage case 23 for storing foods such as desserts, and the inside of the room are decompressed to store food. A reduced-pressure storage chamber 24 is provided for maintaining freshness and for long-term storage. The decompression storage chamber 24 has a width that is narrower than the width of the refrigerator compartment 2, and is disposed adjacent to the side surface of the refrigerator compartment 2.

製氷水タンク２２及び収納ケース２３は左側の冷蔵室扉６の後方に配置されている。これによって、左側の冷蔵室扉６を開くだけで、製氷水タンク２２及び収納ケース２３を引き出すことができる。また、減圧貯蔵室２４は右側の冷蔵室扉６の後方に配置されている。これによって、右側の冷蔵室扉６を開くだけで、減圧貯蔵室蓋５０を開き、減圧貯蔵室２４の食品トレイ６０を引き出すことができる。なお、製氷水タンク２２及び収納ケース２３は左側の冷蔵室扉６の最下段の扉ポケット２７の後方に位置することとなり、減圧貯蔵室２４は右側の冷蔵室扉６の最下段の扉ポケット２７の後方に位置することとなる。ここで、蒸発器１５によって冷却されて冷蔵室２へ送られた冷気が減圧貯蔵室２４の周囲を通って減圧貯蔵室２４の内部を間接冷却するようになっている。   The ice making water tank 22 and the storage case 23 are disposed behind the left refrigerator compartment door 6. Thereby, the ice-making water tank 22 and the storage case 23 can be pulled out only by opening the left refrigerator compartment door 6. The decompression storage chamber 24 is disposed behind the right refrigeration chamber door 6. Accordingly, the decompression storage chamber lid 50 can be opened and the food tray 60 in the decompression storage chamber 24 can be pulled out simply by opening the right refrigerator compartment door 6. The ice-making water tank 22 and the storage case 23 are located behind the lowermost door pocket 27 of the left refrigerator compartment door 6, and the decompression storage chamber 24 is the lowermost door pocket 27 of the right refrigerator compartment door 6. It will be located behind. Here, the cold air cooled by the evaporator 15 and sent to the refrigerator compartment 2 passes through the periphery of the decompression storage chamber 24 to indirectly cool the inside of the decompression storage chamber 24.

製氷水タンク２２の後方には、製氷水ポンプ２８が設置されている。収納ケース２３の後方で且つ減圧貯蔵室２４の後部側方の空間には、減圧貯蔵室２４を減圧するための減圧装置の一例である負圧ポンプ２９が配置されている。負圧ポンプ２９は、減圧貯蔵室２４の側面に設けられたポンプ接続部に導管を介して接続されている。   An ice making water pump 28 is installed behind the ice making water tank 22. A negative pressure pump 29, which is an example of a decompression device for decompressing the decompression storage chamber 24, is disposed behind the storage case 23 and in a space behind the decompression storage chamber 24. The negative pressure pump 29 is connected to a pump connection provided on the side surface of the decompression storage chamber 24 via a conduit.

減圧貯蔵室２４は、食品出し入れ用開口部を有する箱状の減圧貯蔵室本体４０と、減圧貯蔵室本体４０の食品出し入れ用開口部を開閉する減圧貯蔵室蓋５０と、食品を収納して減圧貯蔵室蓋５０に出し入れする食品トレイ６０とを備えて構成されている。減圧貯蔵室本体４０で減圧貯蔵室蓋５０の食品出し入れ用開口部を閉じることにより、減圧貯蔵室本体４０と減圧貯蔵室蓋５０とで囲まれた空間が減圧される低圧空間として形成される。食品トレイ６０は、減圧貯蔵室蓋５０の背面側に取り付けられ、減圧貯蔵室蓋５０の移動に伴って前後に移動可能である。   The decompression storage chamber 24 includes a box-shaped decompression storage chamber main body 40 having an opening for food in / out, a decompression storage chamber lid 50 for opening and closing the food in / out opening of the decompression storage chamber main body 40, and containing the food to reduce the pressure. A food tray 60 that is taken in and out of the storage chamber lid 50 is provided. By closing the food storage opening / closing opening of the decompression storage chamber lid 50 with the decompression storage chamber body 40, the space surrounded by the decompression storage chamber body 40 and the decompression storage chamber lid 50 is formed as a low pressure space to be decompressed. The food tray 60 is attached to the back side of the decompression storage chamber lid 50 and can move back and forth with the movement of the decompression storage chamber lid 50.

減圧貯蔵室２４の内部には、抗酸化剤８１（図４参照）を内部に備えた抗酸化成分放出カセット８０が設置されている。換言すれば、野菜，肉魚などの生鮮食品を保存する減圧貯蔵室２４に空気中の酸素による酸化損失を防止できる抗酸化剤８１を内包する抗酸化成分放出カセット８０が設置されている。この抗酸化成分放出カセット８０は、図２に示すように、食品トレイ６０の背壁部に着脱可能に係着されている。抗酸化剤８１としては、大気圧状態より低い圧力状態の基でより多くの抗酸化成分が放出される抗酸化剤が用いられている。即ち、抗酸化成分放出カセット８０に内包された抗酸化剤８１は、減圧貯蔵室２４内を減圧することにより、抗酸化成分放出カセット８０内部の圧力と抗酸化成分放出カセット８０の外部の圧力との圧力差により抗酸化成分が放出される。   Inside the decompression storage chamber 24, an antioxidant component release cassette 80 provided with an antioxidant 81 (see FIG. 4) is installed. In other words, an anti-oxidant component release cassette 80 containing an anti-oxidant 81 capable of preventing oxidation loss due to oxygen in the air is installed in the decompression storage chamber 24 for storing fresh food such as vegetables and meat fish. As shown in FIG. 2, the antioxidant component release cassette 80 is detachably attached to the back wall portion of the food tray 60. As the anti-oxidant 81, an anti-oxidant that releases more anti-oxidant components under a pressure state lower than the atmospheric pressure state is used. That is, the antioxidant 81 contained in the antioxidant component release cassette 80 depressurizes the inside of the decompression storage chamber 24, thereby reducing the pressure inside the antioxidant component release cassette 80 and the pressure outside the antioxidant component release cassette 80. The antioxidant component is released by the pressure difference.

食品トレイ６０に食品を載せて減圧貯蔵室蓋５０を閉じることにより、減圧貯蔵室２４の内部が密閉状態となり、ドアスイッチがオンされて負圧ポンプ２９が駆動され、減圧貯蔵室２４が大気圧より低い状態に減圧される。これにより貯蔵室１３内の酸素濃度が低下して食品中の栄養成分の劣化を防止することができる。しかも、減圧貯蔵室２４が密閉されて減圧された状態となってから抗酸化剤８１から抗酸化成分の放出が開始されると共に、限られた容積の減圧貯蔵室２４の中で抗酸化成分による食品中の栄養成分と酸素との結合防止をすることができる。その結果、抗酸化成分放出カセット８０の小型化、負圧ポンプ２９の小型化及び減圧貯蔵室２４の筐体の強度低減を可能として食品収納スペースの増大及びコスト低減を図りつつ、減圧貯蔵室２４に収納した食品中の栄養成分の酸化劣化を長期間にわたって防止できる。   By putting food on the food tray 60 and closing the decompression storage chamber lid 50, the inside of the decompression storage chamber 24 is sealed, the door switch is turned on, the negative pressure pump 29 is driven, and the decompression storage chamber 24 is at atmospheric pressure. Depressurized to a lower state. Thereby, the oxygen concentration in the store room 13 can fall and deterioration of the nutrient component in a foodstuff can be prevented. In addition, the release of the antioxidant component from the antioxidant 81 is started after the decompression storage chamber 24 is sealed and decompressed, and the antioxidant component is contained in the decompression storage chamber 24 having a limited volume. It is possible to prevent binding between nutritional components in food and oxygen. As a result, it is possible to reduce the size of the antioxidant component release cassette 80, to reduce the size of the negative pressure pump 29, and to reduce the strength of the housing of the reduced pressure storage chamber 24, thereby increasing the food storage space and reducing the cost. It is possible to prevent oxidative deterioration of nutritional components in the food stored in the container for a long period of time.

そして、減圧貯蔵室蓋５０を手前に引くことにより、減圧貯蔵室蓋５０の一部に設けられた圧力解除バルブがまず動作して減圧貯蔵室２４の減圧状態が解除されて大気圧の状態となり、減圧貯蔵室蓋５０を開くことができる。これによって、簡単に減圧貯蔵室蓋５０を開け、食品の出し入れが出来る。   Then, by pulling the decompression storage chamber lid 50 toward the front, a pressure release valve provided in a part of the decompression storage chamber lid 50 is first operated to release the decompression state of the decompression storage chamber 24 to be in an atmospheric pressure state. The decompression storage chamber lid 50 can be opened. Thus, the decompression storage chamber lid 50 can be easily opened and food can be taken in and out.

次に、図３から図５を参照しながら、抗酸化成分放出カセット８０について具体的に説明する。図３は図２の抗酸化成分放出カセット８０の単独斜視図、図４は図３のＡ−Ａ断面図、図５は図３のＢ−Ｂ断面図である。   Next, the antioxidant component release cassette 80 will be described in detail with reference to FIGS. 3 is a single perspective view of the antioxidant component release cassette 80 of FIG. 2, FIG. 4 is a cross-sectional view taken along line AA of FIG. 3, and FIG. 5 is a cross-sectional view taken along line BB of FIG.

抗酸化成分放出カセット８０は、抗酸化成分を放出する抗酸化剤８１と、この抗酸化剤８１を収納した樹脂容器８２と、この樹脂容器８２の内部の抗酸化成分をその外部に導いて放出する紙８５とを備えて構成されている。紙８５は、和紙や不織布などで形成され、通気性を有している。   The antioxidant component release cassette 80 is an antioxidant 81 that releases an antioxidant component, a resin container 82 that contains the antioxidant 81, and an antioxidant component inside the resin container 82 that is guided outside and released. Paper 85 to be configured. The paper 85 is made of Japanese paper or nonwoven fabric and has air permeability.

抗酸化剤８１は、食品中の栄養成分が空気中の酸素により酸化される前に酸化することにより、食品中の栄養成分の酸化を防止するものである。従って、抗酸化剤は、非常に酸化されやすい物質からなるものである。このように、抗酸化剤８１は、ビタミンＣ，ビタミンＥ及び酵素処理ルチンなど栄養成分を含む自然食品に含有する酸化防止剤、例えばアスコルビン酸やトコフェノールなどが用いられる。   The antioxidant 81 prevents oxidation of nutritional components in food by oxidizing the nutritional components in food before being oxidized by oxygen in the air. Therefore, an antioxidant consists of a substance which is very easy to oxidize. As described above, as the antioxidant 81, an antioxidant contained in a natural food containing nutrient components such as vitamin C, vitamin E, and enzyme-treated rutin, for example, ascorbic acid or tocophenol is used.

また、抗酸化剤８１は、図４および図５に示すように、パルプとバインダーに混合され、かつ粒状である。この抗酸化剤８１は、三方シール包装の袋８６に収納され、樹脂容器８２に収納される。なお、袋８６は、その形状は袋に限定されず、抗酸化剤８１を収納できる形状のものであればよい。また、抗酸化剤８１の抗酸化成分は、袋８６を透過して放出される構成である。すなわち、袋８６の材質としては、ＰＥＴ／ＰＰ混抄不織布等がよい。   Further, as shown in FIGS. 4 and 5, the antioxidant 81 is mixed with pulp and a binder and is granular. This antioxidant 81 is stored in a three-sided sealed bag 86 and stored in a resin container 82. The shape of the bag 86 is not limited to a bag, and any shape that can accommodate the antioxidant 81 may be used. Further, the antioxidant component of the antioxidant 81 is configured to be released through the bag 86. That is, the material of the bag 86 is preferably a PET / PP mixed nonwoven fabric.

パルプは、水分を吸収する、いわゆる吸湿剤の役割をする。パルプの配合量が少ないと、吸湿量が少なくなり、そのため、水に溶け易いビタミンＣが溶出し易くなる。これにより、抗酸化成分がカセットから放出する量が少なくなり、目的の鮮度保持効果が得られなくなる。そこで、パルプは、抗酸化剤に対して５０％以上１００％以下の割合で配合される。   Pulp acts as a so-called hygroscopic agent that absorbs moisture. When the blending amount of the pulp is small, the moisture absorption amount is decreased, and therefore, vitamin C which is easily dissolved in water is easily eluted. As a result, the amount of the antioxidant component released from the cassette is reduced, and the desired freshness maintaining effect cannot be obtained. Therefore, the pulp is blended at a ratio of 50% to 100% with respect to the antioxidant.

樹脂容器８２は、抗酸化剤８１を収納した樹脂容器本体８３と、樹脂容器蓋８４とからなっている。樹脂容器本体８３の周縁部と樹脂容器蓋８４の周縁部とを重ねて、当該両周縁部を紙８５が介在された部分を除いて全周にわたって接合している。   The resin container 82 includes a resin container main body 83 that contains an antioxidant 81 and a resin container lid 84. The peripheral edge of the resin container main body 83 and the peripheral edge of the resin container lid 84 are overlapped, and both peripheral edges are joined over the entire periphery except for the portion where the paper 85 is interposed.

樹脂容器蓋８４は、表側に突出する突部８４ｂを形成することにより、樹脂容器本体８３側の面に全長にわたって凹部８４ｃが形成されている。紙８５は、樹脂容器蓋８４の凹部８４ｃ内に全長にわたって配置され、両端部が樹脂容器８２の外部に臨んでいる。これによって、樹脂容器８２内に配置された抗酸化剤８１から放出される抗酸化成分は、挟持された紙８５の部分のみを通して樹脂容器８２の外部空間である減圧貯蔵室２４内に放出される。従って、減圧貯蔵室２４内への抗酸化成分の放出率は、紙８５の挟持部の断面積（換言すれば、紙８５の厚みまたは幅）、挟持部における長さを調整することにより容易に調整することができる。   The resin container lid 84 is formed with a concave portion 84c on the entire surface of the resin container main body 83 by forming a protrusion 84b protruding to the front side. The paper 85 is disposed over the entire length in the recess 84 c of the resin container lid 84, and both end portions face the outside of the resin container 82. As a result, the antioxidant component released from the antioxidant 81 disposed in the resin container 82 is released into the decompression storage chamber 24 which is the external space of the resin container 82 through only the sandwiched paper 85 portion. . Therefore, the release rate of the antioxidant component into the decompression storage chamber 24 can be easily adjusted by adjusting the cross-sectional area of the sandwiched portion of the paper 85 (in other words, the thickness or width of the paper 85) and the length of the sandwiched portion. Can be adjusted.

次に、図６から図８を参照しながら、抗酸化成分放出カセット８０中の抗酸化剤８１の詳細について説明する。抗酸化剤としてアスコルビン酸を用いた場合、アスコルビン酸は常温で固体であり、通常減圧しても気化しない。そこで、鋭意研究の結果、アスコルビン酸と水分を吸着する吸着剤を混合することにより抗酸化剤を有効に放出できることを見出した。図６はアスコルビン酸放出下で３日間保存したときのほうれん草のビタミンＣ残存率を測定した結果を、図７はアスコルビン酸放出下で３日間保存したときのマグロのＫ値を測定した結果を、図８はアスコルビン酸放出下で３日間保存したときの牛肉の色調を測定した結果を示す。図６から図８の１０１は抗酸化成分放出カセット８０がない場合、１０２は抗酸化成分放出カセット８０中の抗酸化剤８１をアスコルビン酸粉末と吸着剤とウレタンを混練した粒子とした場合、１０３は１０２のウレタンをメチルセルロースにした場合、１０４は１０２のウレタンを半分にした場合、１０５は抗酸化成分放出カセット８０中の抗酸化剤８１をアスコルビン酸粉末とした場合を示す。このウレタンやメチルセルロースはアスコルビン酸粉末と吸着材とのバインダーとなっている。   Next, the details of the antioxidant 81 in the antioxidant component release cassette 80 will be described with reference to FIGS. When ascorbic acid is used as an antioxidant, ascorbic acid is solid at room temperature and usually does not vaporize even under reduced pressure. As a result of intensive research, it was found that an antioxidant can be effectively released by mixing an adsorbent that adsorbs ascorbic acid and moisture. FIG. 6 shows the result of measuring the residual rate of vitamin C in spinach when stored for 3 days under ascorbic acid release, and FIG. 7 shows the result of measuring the K value of tuna when stored for 3 days under ascorbic acid release. FIG. 8 shows the results of measuring the color of beef when stored for 3 days under ascorbic acid release. 6 to 8, 101 is the case where there is no antioxidant component release cassette 80, 102 is the case where the antioxidant 81 in the antioxidant component release cassette 80 is a particle obtained by kneading ascorbic acid powder, adsorbent and urethane, 103 Is the case where the urethane of 102 is methylcellulose, 104 is the case where the urethane of 102 is halved, and 105 is the case where the antioxidant 81 in the antioxidant component release cassette 80 is an ascorbic acid powder. This urethane or methylcellulose is a binder between ascorbic acid powder and an adsorbent.

図６から図８において、アスコルビン酸粉末のみ１０５は抗酸化成分放出カセット８０がない場合１０１と同等の値であり、抗酸化作用が無いことがわかる。これに対し、バインダーにウレタンを活用した場合１０２とメチルセルロースを活用した場合１０３は抗酸化成分放出カセット８０がない場合１０１よりビタミンＣが多く残存し、鮮度の指標であるＫ値が小さく、牛肉の色調が良く保たれており、抗酸化作用が高いことが判る。   6 to 8, it can be seen that only ascorbic acid powder 105 has a value equivalent to 101 when there is no antioxidant component release cassette 80, and has no antioxidant action. In contrast, when urethane is used as the binder and when 103 is used as the methyl cellulose, more vitamin C remains than when 101 does not have the antioxidant component release cassette 80, and the K value, which is an index of freshness, is small. It can be seen that the color tone is well maintained and the antioxidant effect is high.

また、バインダーにウレタンを活用した場合１０２とウレタンを半分とした１０３を比較すると、半分にした１０３のほうが抗酸化作用は小さい。このように、バインダーの使用量には最適量があり、バインダーと抗酸化剤との配合比は抗酸化剤１に対してバインダーが０.０５以上、０.５以下の範囲で配合するのが好ましい。すなわち、バインダーは抗酸化剤に対して５％以上５０％以下の割合で配合するのが好ましい。

In addition, when urethane is used as a binder, comparing 102 with 103 in which urethane is halved, the halved 103 has a smaller antioxidant effect. Thus, there is an optimum amount of the binder used, and the blending ratio of the binder and the antioxidant is such that the binder is blended with respect to the antioxidant 1 in the range of 0.05 or more and 0.5 or less. preferable. That is, the binder is preferably blended at a ratio of 5% to 50 % with respect to the antioxidant.

次に、図９を参照しながら、抗酸化剤８１の抗酸化成分の放出量と減圧量との関係について説明する。図９は抗酸化剤８１の抗酸化成分の放出量と減圧量との関係の測定結果を示す図である。   Next, the relationship between the release amount of the antioxidant component of the antioxidant 81 and the reduced pressure amount will be described with reference to FIG. FIG. 9 is a diagram showing the measurement result of the relationship between the release amount of the antioxidant component of the antioxidant 81 and the reduced pressure amount.

抗酸化剤８１の抗酸化成分の放出量と減圧量との関係を測定する試験方法は、密閉容器に抗酸化剤８１を内部に備えた抗酸化成分放出カセット８０を入れ、負圧ポンプにより密閉容器内の空気を吸い出して密閉容器内を減圧して一定に保持し、そのときの密閉容器内の抗酸化剤８１の濃度を測定した。   The test method for measuring the relationship between the release amount of the antioxidant component of the antioxidant 81 and the reduced pressure amount is to put the antioxidant component release cassette 80 having the antioxidant 81 inside in a sealed container and seal it with a negative pressure pump. Air in the container was sucked out and the inside of the sealed container was decompressed and kept constant, and the concentration of the antioxidant 81 in the sealed container at that time was measured.

図９において、縦軸に抗酸化剤濃度、横軸に一定減圧になったときを０分としたときの経過時間を示す。図中の符号２８は密閉容器内を０.７気圧に保った場合、符号２９は密閉容器内を０.９５気圧に保った場合、符号３０は大気圧の場合を示す。   In FIG. 9, the vertical axis shows the antioxidant concentration, and the horizontal axis shows the elapsed time when 0 minutes is obtained when the pressure is constant. Reference numeral 28 in the figure indicates a case where the inside of the sealed container is maintained at 0.7 atmosphere, reference numeral 29 indicates a case where the inside of the sealed container is maintained at 0.95 atmosphere, and reference numeral 30 indicates a case where atmospheric pressure is applied.

図９より明らかなように、密閉容器内が大気圧の９６の場合、抗酸化剤の密閉容器内の濃度は上昇しなかったのに対し、減圧した９４，９５は抗酸化剤の濃度が上昇すると共に、更には、０.９５気圧に保った９５よりも容器内を０.７気圧に保った９４のほうが放出量が大きくなったことが判る。従って、減圧することにより抗酸化剤８１を密閉容器内に放出させることが出来る。従って、密閉容器の減圧量で抗酸化剤８１の抗酸化成分の放出量を制御できる。しかし、密閉容器内の圧力を低くすればするほど、密閉容器の耐圧構造を強化する必要があるため、密閉容器のコストが増大する。従って、減圧時の圧力は０.８０〜０.９５の範囲とすることが好ましい。   As is apparent from FIG. 9, when the inside of the sealed container is 96 at atmospheric pressure, the concentration of the antioxidant in the sealed container did not increase, whereas in 94 and 95 reduced in pressure, the concentration of the antioxidant increased. In addition, it can be seen that the amount of discharge was larger in 94 in which the inside of the container was kept at 0.7 atm than in 95 kept at 0.95 atm. Therefore, the antioxidant 81 can be released into the sealed container by reducing the pressure. Therefore, the release amount of the antioxidant component of the antioxidant 81 can be controlled by the reduced pressure amount of the sealed container. However, the lower the pressure in the sealed container, the more the pressure-resistant structure of the sealed container needs to be strengthened, so the cost of the sealed container increases. Therefore, the pressure during decompression is preferably in the range of 0.80 to 0.95.

本発明の一実施形態の冷蔵庫の中央縦断面図である。It is a center longitudinal cross-sectional view of the refrigerator of one Embodiment of this invention. 図１の冷蔵室の最下段空間部分の断面斜視図である。It is a cross-sectional perspective view of the lowest space part of the refrigerator compartment of FIG. 図２の抗酸化成分放出カセットの単独斜視図である。FIG. 3 is a single perspective view of the antioxidant component release cassette of FIG. 2. 図３のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図３のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 抗酸化剤の配合成分の違いによるほうれん草のビタミンＣ含量測定結果を示す図である。It is a figure which shows the vitamin C content measurement result of the spinach by the difference in the mixing | blending component of an antioxidant. 抗酸化剤の配合成分の違いによるマグロのＫ値測定結果を示す図である。It is a figure which shows the K value measurement result of a tuna by the difference in the mixing | blending component of an antioxidant. 抗酸化剤の配合成分の違いによるで牛肉の色調測定結果を示す図である。It is a figure which shows the color tone measurement result of beef by the difference in the mixing | blending component of an antioxidant. 抗酸化剤の抗酸化成分の放出量と減圧量との関係の測定結果を示す図である。It is a figure which shows the measurement result of the relationship between the discharge | release amount of the antioxidant component of an antioxidant, and the pressure reduction amount.

符号の説明Explanation of symbols

２４ 減圧貯蔵室
５０ 減圧貯蔵室蓋
８０ 抗酸化成分放出カセット
８１ 抗酸化剤
８２ 樹脂容器
８３ 樹脂容器本体
８４ 樹脂容器蓋
８５ 紙 24 Depressurized storage chamber 50 Depressurized storage chamber lid 80 Antioxidant component release cassette 81 Antioxidant 82 Resin container 83 Resin container body 84 Resin container lid 85 Paper

Claims (5)

冷蔵庫内に形成され大気圧より低い圧力状態に減圧される貯蔵室内に抗酸化剤を有する抗酸化成分放出手段が設けられ、前記抗酸化剤はパルプとバインダーに混合されて粒状であって、前記抗酸化成分放出手段は、前記抗酸化剤を収納した樹脂容器本体と樹脂容器蓋とを有する樹脂容器と、を備え、前記樹脂容器蓋は前記樹脂容器本体側の面に全長にわたって凹部を形成し、前記樹脂容器内部の抗酸化成分を外部に導いて放出する部分として紙を備え、該紙は、前記凹部内に全長にわたって配置され、前記樹脂容器本体の周縁部及び前記樹脂容器蓋の周縁部は、その一部に前記紙を介在して接合して、前記紙の両端部が当該樹脂容器の外部に臨んでおり、前記抗酸化剤は大気圧状態よりも低い圧力状態の下で抗酸化成分が前記紙を通して多く放出されることを特徴とする冷蔵庫。 An anti-oxidant component releasing means having an anti-oxidant is provided in a storage chamber formed in the refrigerator and depressurized to a pressure lower than atmospheric pressure, and the anti -oxidant is mixed with pulp and binder and is granular, The antioxidant component releasing means includes a resin container main body containing the antioxidant and a resin container having a resin container lid, and the resin container lid forms a recess over the entire length of the resin container main body side. , Including a paper as a part for guiding and releasing the antioxidant component inside the resin container to the outside, the paper being disposed over the entire length in the recess, and a peripheral part of the resin container main body and a peripheral part of the resin container lid The paper is joined to a part of the paper, both ends of the paper face the outside of the resin container, and the antioxidant is antioxidant under a pressure state lower than the atmospheric pressure state. many components through the paper Refrigerator, characterized in that it is issued. 請求項１において、前記抗酸化剤としてアスコルビン酸またはトコフェノールを用いたことを特徴とする冷蔵庫。 The refrigerator according to claim 1 , wherein ascorbic acid or tocophenol is used as the antioxidant . 請求項１又は２において、前記パルプは前記抗酸化剤に対して５０％以上１００％以下の割合で配合されることを特徴とする冷蔵庫。 According to claim 1 or 2, wherein the pulp refrigerator characterized by Rukoto formulated at a ratio of 50% to 100% with respect to the antioxidant. 請求項１乃至３のいずれかにおいて、前記バインダーはウレタンまたはメチルセルロースであって、前記バインダーは抗酸化剤に対して５％以上５０％以下の割合で配合されることを特徴とする冷蔵庫。 The refrigerator according to any one of claims 1 to 3, wherein the binder is urethane or methylcellulose, and the binder is blended at a ratio of 5% to 50% with respect to the antioxidant . 請求項１乃至４のいずれかにおいて、前記貯蔵室の減圧時の圧力を０.８０〜０.９５気圧に設定したことを特徴とする冷蔵庫。 The refrigerator according to any one of claims 1 to 4 , wherein the pressure during decompression of the storage chamber is set to 0.80 to 0.95 atm .
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